I received 5 O.T. lilies about 1.5 weeks ago and I planted them. We have had unusually mild weather since then. I am expecting two more lilies from another nursery and when I called to see when they would be sending them she said - Southern Ontario is much too warm to plant these lilies now - they will grow. If the ones I did plant do start to grow will they be damaged by the first frost. They are planted 8-9: deep. Is there anything I can do to make sure they survive. Thanks